This type of metal thread was traditionally used for European military and diplomatic uniforms, especially down the front of the jackets and on the epaulets, as a form of passementerie.
Digital source of illustration (retrieved 8 June 2016).
GVE
Bullion
Examples of bullion metal threads.
Bullion is a metal thread made from very fine wires wound into a tubular shape. It is very similar to purl metal thread. The main forms of bullion are: a) Bright check bullion, which has a faceted (zig-zag) and very shiny surface; b) Wire bullion, which has a smooth surface and is matt in appearance; c) Bright bullion, which is a form of bullion that has a smooth surface and is shiny in appearance.
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Metal threads